Discharge nozzle for hydrating cementitious substances under pressure



M. DISCHARGE NOZZLE FOR HYDRATING CEMENTITIO SUBSTANCES UNDER PRESSURE Filed March 20, 1950 G. PRO

Dec. 4, 1951 2 SHEETS-SHEET 1 50/27 fol/me INVENTOR. /y Marcus /0 HTTORNEK 1386- 1951 ca. M. PRO

DISCHARGE NOZZLE FOR HYDRATING CEMENTITIOUS SUBSTANCES UNDER PRESSURE Filed March 20, 1950 2 SHEETSSHEET 2 INVENTOR. fiea/ye w/a/s Pro ATTORNEK Patented Dec. 4, 1951 STATES PATENT OFFICE PRESSURE George Marcus Fro, Kansas City, Mo., assignor to J Zach Miller-.111, Kansas City, Mo., trustee Application March 20, 1950, Serial N o. 150,579

6 Claims. (o1. 2594151). 'f

Thisinvention has to do with the fieldofbuilding and construction and relates more specifically to apparatus for applying cementitious' substances such as concrete that includes. an admixture of cement, water and an aggregate, the primary object being to provide a nozzle con struction particularly adapted for use with apparatus having means for forcibly directing the material to be applied to the nozzle, together with a source of air and water under pressure.

It is the most important object of themesent invention to provide nozzle structure adapted to receive and apply cementitious materials and having a body of a tubular nature provided with a removable insert adapted to span the distance across a pair of equalizing chambers in the body for water and air respectively and having a plurality of perforations for receiving the admixed. airand water and directing the same into the interior of the body.

Another :important object of the present invention is .to provide a nozzle structure havinga hollow body. provided with a pair of continuous annular equalizing chambers therein. adapted to receive air and water under pressure respectively; there being a frusto-conical, ring-like insert in the body spanning the distance across the chambers, but, presenting a space between the latter and having outletv perforations formed therein whereby air is directed from its chamber to the water chamber and the admixed air and water pass into the interior of the body through the perforations of the insert. V

Another object of the present invention is to provide a, nozzle having a hollow body provided with an outlet, spout that includesan elongated sleeve and arubber tube within the sleeve and projecting beyond the outermost end of the sleeve, the tube being rebent on the sleeve and held tightly in place within the body, all to the end that a long-lasting, efiiciently operating nozzle construction is presented. 7

Other objects of the invention include the way in which the frusto-conical insert is seated within the body; the way in which the insert is releasably held in place through the medium of washer means and sectional body construction; the manner of arranging the outlet passages of the insert to direct the water and air mixture properly'into the nozzle; and the way in which the component-parts of the nozzle construction are held together for quick and easy disassembling for repair, cleaning or replacement of parts as desired.

In the drawing: 1 g Figure 1 is a perspective view of apparatus for applying cementitious substances under pressure'made in accordance with the present inventionand illustrating the nozzle thereof on 'ane'nla'rged scale;

Fig. 2 is a top plan view of the nozzle per se.

Fig. 3 is a fragmentary, side elevational view of the nozzle parts, including the water valve thereof, being broken away and in section to reveal details of construction; and

Fig. 4 is a longitudinal, cross-sectional View taken on line IVIV of Fig. 2, looking in the direction of the arrows.

While the mobile apparatus illustrated in Fig. 1 of the drawings forms no part of this invention, a brief description thereof will teach the nature and purposes of producing the novel nozzle construction hereinafter described. Such apparatus includes a pair of interconnected, super:- imposed hoppers l0 and I2 having a gatethere between that ismanually controlled by -a lever M. A funnel l6 communicates with the hopper ill at the top thereof for receiving cement and aggregate and a gate between funnel l6 and hopper I0 is manually controlled through the mediumiof a lever l8. -A hosev interconnects a source of compressed air not shown, with a moisture removingttankg22 that inturn joins with a pressure regulator 24 by means of a valved line 26. Compressed air is also directed from line 26 through valved tube 28 to an air motor 30. Motor 30 is operably connected through gear box 32 with an agitator and metering mechanism disposed in hopper l2.

Hoppers l0 and I2 are presssurized by means of valved conduits 34 and 36 respectively and air under pressure is directed to the lowermost outlet end-ofhopper 12 by means of valved line 38. The dry, admixed material is fed to a hose 40 from hopper I2 by means of the aforesaid metering mechanism and such material is forced into the nozzle construction forming the subject matter hereof and broadly designated by the numeral 42 by means of the air pressure in line 38.

A hose 44' coupled with nozzle 42 may either be connected with the source of compressed air with which hose 20 is joined, or be coupled with line 26 as desired. A second hose 46 is connected with a source of water under pressure. not shown.

Nozzle 42 includes a tubular body having one end thereof internally tapped to threadably receive an externally threaded, relativelywshort tube 50 that in turn has hose 40 telescoped thereon. An inturned flange 52 in body 48, faces outwardly toward the tube 50 and a continuous annular air equalizing chamber 54 is formed in body 48 adjacent flange 52. A water equalizing chamber 56 formed in body 48 is of substantially the same character as chamber 54 except that the same is slightly wider as shown in Figs. 3 and 4, and an inturned flange 58 serves as a partition between chambers and 56. Y

- A-third annular inturned flange-60, forms one side of the chamber 56 and faces outwardly in a directionoppos'itelyto tube 50; Inlet'openings 62 and 64 are formed in body 48 in communication with chambers 54 and 56 respectively, and

L-shaped couplings 55 and 68 are threadably iIr-" serted in openings 62 and 64 respectively. V

A manually operable valve T isintrpo'sefi' be; tween hose 44 and coupling 65 and a second manually operable valve 12 interconnects coupling 68 and hose 46. y I v The innermost annular edges of flanges 52,- 58' and 60 are contoured angularly to conform to the shape f a frusto-conical ring-like insert that is disposed within body 48. It is noted that the insert 14 is seated tightly on the inclined edges or'fla'nges 52 and 63'; but that the innermost edge of flange -8 is-spaced from the outermost: face": of insert 14-, thereby presenting an annular passageway 16' circums'cribing insert 14" and placing chambers 54 and 58 in direct communication; Insert 14 is held wedged tightly in placeaga'inst the flanges 52 and 611 by means of a gasket 18 that is interposed betweeir the proximal races of flan g'e'52 and'tube-5G, and'bearsagainst the'pro'ximal base edge of insert T4. thus 'closes the chambers 54 and 55 from the in terior of body 48with the exception of an annular row' of passages 85'- forzned in the-insert l4: and communicating with the annular chamber 58.

A's s'hown'in Figs. Band 4, thesepassagestll are all inclined inwardlytoward the longitudinal axis of Fig; 40f the drawings;

proximal to inturned llangefifl, is also internally tapped ror tlire'adably'receiving an elongated cysaunter externally thr'eaded sleeve'fll A relaative'l'y long, flexible tube M'made from rubber or are material is tele's'coped within: the sleeve 82' and-extends cutwardly beyond theoutermost free end of the latter. The innermost end' of the flexible tube 84 is rebent upon-itself or partial circuhiscribing relationship to the proximal end of sleeve 82 as at 85. As sleeve 82 is fOrc'edinto the body 48, tube 84* is" brought to bear tightly against the outwardly facing side of shoulder 65 atlineo'f-bencltfi of hose-84; Itis-noted tha-t the outside diameter ofhose84 is slightly 1885115118211 the inside diameterofsleeve'82.

Iii-operation,- as the dry materialincluding'cement and aggregate,- is: forced into nozzle 42 through hose 4t;v selected amounts. or air and waterT are-simultaneously directed into" body 48 and tube 84' by adjustment of valves-10a'nd: 12 respectively It is seen that airenterihginletfii e'qualizes in chamber 54 and is free" to flow through passageway IE-r into water equalizing chamber 55: Such" air" admix'es with l the? water and" carries the same in theform ofai-relatively fine atomized mist through passages B-G int'o in s'ert 14' and thence into tube 84. The' ang'ula'rity of passages tlll serves tocause thea'ir and water mixture to I be. directed toward the: center of the flowing materialthrough nozzle 42-and to thereby evenly distribute'the'water through the dry materialandeffectively hydrate the same.

To a certain extent also; byvirtue of the fact that air and water enters nozzle- 42 under" pres sure, the inwardly directed air and 'water mixture will'aid inforclngthe material through the-nozzle 4-2- and out of the discharge end-0f tube-84 thereof;

The pressurized air flowing through passageway 16 aids in forcing the water fromgchamber: 55 -into the, dry. materialbeingdirected through theinsert- Removable insert 14-,

I4 and tube 84. Furthermore, by admixing the air and water prior to introduction thereof to the drymaterial, an effectivevaporization of the water is produced and when the air and water mixture passes into the dry material, the latter will become completely and thoroughly dampened to the extent desired and depending upon the amount of water that is permitted to flow into inlet 64 by adjustment of valve E2. The controls 10 and 12 permit the operator to vary the nature of thematerial' emanating from tube 84 with respect to the extent of water content with extreme accuracy as desired.

Itis"noted that an effective seal is presented through use of the insert 34 whereby none of the cementitious' material: can enter the chambers 54 and 56: and thereby clog the samean'd fillthe in lets-bl and64. The pressure behind the air and water willfma'intain the relatively small angularly disposed outlet passages 85' open atall timesgancl the gasket 18* will prevent entrance of the material into the chamber 54' behind or along the outermost surf ace of insert l4,

Additionally, by virtue of the tight; abutting fit between line of ben'd' 88' of tube 84" and: the shoulder 50', none of the material will'pass to the outermost surface of sleeve 82-". Rebendingof the hose84 upon the sleeve- 82 as at 88, consti tutes an efiicientand inexpensive way of joining liose84'and sleeve 82 andthesetWo'merhbers can be thus interconnected quickly and" easily by the operator. Since sleeve 82 is releasably mounted in body. 48, hose 34 can be repla'cedwith ease whenever necessary. However, because of the flexibility of hose 84 andthe way" in which it is'permitted. to vibrate within sleeve" 82 and expand as necessary,-replacement ofsuch spout construction 84' will not become necessaryexcept after long: continued use. By provision of a removable insert 14, the latter can" be manufactured withhi'gh precision and readily replaced by merely removing tube 58 from within body 48'; Further, by provision of removable insert 14, the annular chambers 54 and 56 can-be inexpensively formedin" the body 48' and with accuracy as needed.

In substance therefore, the entire nozzle" construction 42 is made of a number of separate interconnected parts, any one of which may be-replaced-with little. expense and without loss: of valuable time:

Having thus described theinvention, whatis claimed as new and-desired to'be-securedby Letters Patent is: V

1. In a discharge nozzle. a tubular body; a ring-shaped insertin the body; a pairof fluid inlets formed in said-body; an annular equalizing chamber for each inlet respectively formed in'the body-,saidchambers being incommunication and circumscribingsaidinsert; and a number of passages formed in the insert and constituting" the sole; means for placingsaid. chambers-in communication with the interior ofv saidbody;

2-; .In' a dischargenozzle; a tubular body having'an inlet endand an outlet end; aring-shaped ns r i th bedr r o f d; inlebsi er rs fie dfio i a an ular zi h e for each inlet respectively'formed in-the bodyysaid chambers being in communication and circum scribing said insert; and a number of; passages formedin the insert in alignment w-ithone' of said chambers for placin said chambers in communication with the interio r of said body.

v. leaid s bet le. atubular b d ha ing an inlet end and an outlet end ;-,-.a-pair of spaced, internal, annular flanges in the body; a ring-shaped insert in the body and engaging said flanges; a pair of fluid inlets formed in said body; an annular equalizing chamber for each inlet respectively formed in the body between said flanges, said chambers being in communication and circumscribing said insert; and a number of passages formed in the insert and placing said chambers in communication with the interior of said body.

4. In a discharge nozzle, a tubular body; a ring-shaped insert in the body; a pair of fluid inlets formed in said body; an annular equalizing chamber for each inlet respectively formed in the body, said chambers being in communication and circumscribing said insert; and a number of passages formed in the insert and placing said chambers in communication with the interior of said body, said insert being spaced from the inner walls of said body between said chambers, presenting a passageway between the latter.

5. In a discharge nozzle, a tubular body; a pair of spaced, internal, annular flanges in the body; a pair of annular equalizing chambers formed in said body between said flanges; a

third, annular, inturned flange in the body separating said chambers; and a ring-shaped insert disposed in the body and engaging said pair of flanges, said insert having a number of passages placing thebody in communication with the chambers, there being a fluid inlet formed in the body for each chamber respectively, said third flange being spaced from said insert presenting a passageway between the chambers. 6. In a discharge nozzle, a tubular body, an elongated, ring-shaped insert in the body; a pair of fluid inlets formed in said body; an annular equalizing chamber for each inlet respectively formed in the body, said chambers being in communication and cireumscribing said insert; and a number of passages formed in the insert and placing said chambers in communication with the interior of said body, said insert being disposed in transverse, spanning relationship to said chambers, said body being in surrounding engagement with the insert adjacent each end thereof respectively.

7 GEORGE MARCUS PRO.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 998,762 Faller July 25, 1911 1,370,289 Crippen Mar. 1, 1921 1,562,194 Schaefer Nov. 17, 1925 1,670,677 Brown May 22, 1928 1,847,261 Pawling Mar. 1, 1932 2,075,867 Sampel Apr. 6, 1937 2,462,323 Hurst Feb. 22, 1949 2,534 116 Fjeldstad Dec. 12, 1950 

